Description
5/2 & 5/3 Way Pneumatic Air Pilot Valve – SK520 & SK530 Series
The SK520 & SK530 Series is a versatile range of 5/2 and 5/3 way pneumatic air pilot valves designed for reliable directional control of pneumatic cylinders, actuators and compressed air systems. Featuring external air pilot operation, the valves provide dependable switching without requiring an electrical solenoid or power supply.
Available in 1/8", 1/4", 3/8" and 1/2" BSP port sizes with single or double pneumatic pilot options, the SK520 & SK530 Series is ideal for industrial automation, OEM machinery, remote pneumatic control and applications where electrical operation is not required.
Why Choose the SK520 & SK530 Series?
✓ External air pilot operation
✓ No electrical power required
✓ 5/2 single or double pilot options
✓ 5/3 double pilot valve options
✓ X or Y centre function options
✓ 1/8" to 1/2" BSP port sizes
✓ High-flow pneumatic design
✓ Robust aluminium alloy body
✓ Suitable for hazardous environments
✓ Fast and accurate pneumatic response
✓ BSP, NPT and Rc thread options
✓ Proven industrial reliability
Valve Specification
Function: 5/2 or 5/3 way pneumatic directional control valve
Operation: External air pilot
Pilot pressure: 1.5 to 7 Bar
5/2 configurations:
Single pneumatic pilot
Double pneumatic pilot
5/3 configurations:
Double pneumatic pilot only
Centre options:
X – Exhaust Centre
Y – Pressurised Centre
Port sizes:
1/8" BSP
1/4" BSP
3/8" BSP
1/2" BSP
Optional threads: NPT or Rc
Operating pressure:
5/2 valves: 0 to 8 Bar
5/3 valves: 0 to 7 Bar
Proof pressure: 9.9 Bar
Body: Aluminium alloy
Seals: NBR
Media: Compressed air and inert gases
Ambient temperature: -10°C to +80°C
Effective Orifice Area
1/8" BSP: 5/2 – 18mm² / 5/3 – 14mm²
1/4" BSP: 5/2 – 18mm² / 5/3 – 14mm²
3/8" BSP: 5/2 – 35mm² / 5/3 – 32mm²
1/2" BSP: 5/2 – 70mm² / 5/3 – 54mm²
Valve Operation
The SK520 & SK530 Series uses an external compressed air pilot signal to shift the internal valve spool, providing accurate pneumatic directional control without an electrical solenoid. Shako specifically identifies the range as externally piloted and suitable for flammable working environments.
5/2 Single Pilot:
Applying pilot pressure shifts the valve to its operating position. Removing the pilot signal allows the valve to return to its normal position.
5/2 Double Pilot:
Applying pilot pressure to either pilot port shifts the valve to the corresponding operating position. The valve remains in its last switched position until the opposite pilot signal is applied.
5/3 Double Pilot:
Applying either pilot signal shifts the valve to its respective operating position. When both pilot signals are removed, the valve returns to its selected centre position.
Centre Functions
X Centre (Exhaust Centre)
When both pilot signals are removed, the valve returns to its exhaust centre position.
This configuration is suitable for applications requiring the actuator ports to exhaust when the control signals are removed.
Y Centre (Pressurised Centre)
When both pilot signals are removed, the valve returns to its pressurised centre position.
This configuration is suitable for pneumatic circuits requiring the actuator ports to remain pressurised in the centre position.
The Shako ordering information confirms X as Exhaust Centre and Y as Pressurised Centre.
Typical Applications
Pneumatic cylinders
Pneumatic actuators
Industrial automation
OEM machinery
Packaging equipment
Assembly machinery
Process control systems
Pneumatic control panels
Material handling equipment
Remote pneumatic control
Hazardous environment applications
General compressed air installations
Quality & Reliability
Every SK520 & SK530 Series pneumatic air pilot valve is individually function tested before dispatch to ensure reliable operation and consistent performance.
The robust aluminium construction, external air pilot operation and high-flow design provide dependable long-term service in demanding pneumatic applications.
Technical Information
Valve type: 5/2 and 5/3 way pneumatic air pilot valve
Operation: External air pilot
Pilot pressure: 1.5 to 7 Bar
Operating pressure: Up to 8 Bar
Proof pressure: 9.9 Bar
Body: Aluminium alloy
Seals: NBR
Media: Compressed air and inert gases
Ambient temperature: -10°C to +80°C
HS Code: 8481201000
Why Buy From Solenoid Valve World?
✓ Large UK stocks available
✓ Technical support from pneumatic specialists
✓ BSP, NPT and Rc thread options
✓ Multiple valve configurations available
✓ Spare pneumatic components available
✓ Free next working day UK delivery
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